List of top Biology Questions

In absence of fertilization, corpus luteum degenerates into ____________.
Select and rewrite appropriate disorder of respiratory system with the given symptoms : [ sinusitis, emphysema, silicosis and asbestosis, laryngitis ]
Expand the term ZIFT.
Bt cotton formed from:
A normal couple produces half the sons as haemophilic and half the daughters as carriers. Choose the option that correctly indicates the chromosome on which the gene for this trait is located.
Name the type of heterogamety observed in most birds.
Write short notes on any two of the following: ( Red Data Book
Interpret the given diagrams A and B. Enlist the changes occurring during inspiration and expiration.
Describe nervous system in planaria with well labelled diagram.
Describe histological structure of Testis with well labelled diagram.
Describe pyramid of energy with the help of diagram.
Give the name and type of I, IV and VII cranial nerves.
What are chromosomal disorders? Describe Turner's syndrome and Klinefelter's syndrome.
Explain green house effect with reference to gases responsible for it and their sources.
What is lac? Enlist economic importance of Lac.
Describe physiological effects and applications of ethylene.
Explain following terms : (a) Grafting \quad (b) Apomixis \quad (c) Polyembryony \quad (d) Parthenocarpy
Explain the steps involved in preliminary treatment of sewage.
Identify A, B, and C from the above diagrams and give their functions.
Explain different steps involved in PCR technique.
Give the different steps involved in formation of m-RNA from hn-RNA.
Explain unique features of acquired immunity.
Name and describe hormones secreted by ovaries.
What are the limitations of root pressure theory?
Explain factors affecting water absorption.